Writing instrument



FIG. 1 is a perspective view of a writing instrument showing our new design;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a back view of FIG. 1;

FIG. 4 is a right side view of FIG. 1, the left side view being a mirror image of the right side view;

FIG. 5 is an enlarged top view of FIG. 1; and,

FIG. 6 is an enlarged bottom view of FIG. 1.

Portions of the writing instrument shown in broken lines are for the purpose of showing features that form no part of the claimed design.

Stippling indicates contrast in color. 

We claim the ornamental design for a writing instrument, as shown and described. 